Problem with BIOS password for MSI GT73EVR

[adamantinus]

Hi everyone,

I have a problem with my BIOS password on MSI GT73EVR Laptop (2017)
I forgot the password because I set it 3 years ago.
Probably the pass is an easy example, but I don't remember. passwords that I try:
B10s-p4ss
H3ll0-W0rld
B10s-Ms1
gt73-t1t4n
etc...

I tried this:
I opened the laptop and removed cmos battery, but password is persistent.
Then i used the CH341A programmer to extract the BIOS to find the key with UEFITool. (attached .bin in txt)
Here the hex code:

20 16 9D F6 72 33 EA 38 15 84 E1 5D B5 73 EB 74
6B B7 82 9E 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 C6 90 59 A0 A3 4A FE 37
B7 D6 CF 88 9B 13 D9 7E B4 CE B4 24 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
01 00

I have read this documentation.
https://www.badcaps.net/forum/showthread.php?t=103526

I try example for ASUS, HP and DELL this guide (but XOR calculator not work for this MSI)
https://www.badcaps.net/forum/showpo...55&postcount=2

I am doing something wrong?

and this post:
AMITSESetup Decryptor (I don't know Python, I don't understand why the script gives me an error)
https://www.badcaps.net/forum/showthread.php?p=1098223
(I did not succeed)


I can't find exactly info for MSI and any solution shown there not work for me.

I ask for help, if someone can help me to solve the password.
(Sorry for my bad English)

[hardware1]

Re: Problem with BIOS password for MSI GT73EVR

It's better to upload your backup bios here, and someone will try to decrypt it or remove it for you.

[adamantinus]

Re: Problem with BIOS password for MSI GT73EVR

It's better to upload your backup bios here, and someone will try to decrypt it or remove it for you.

sharing my bios is not dangerous?
I mean posting the BIOS includes my hardware info or serial number

But I'm not sure,
If I can solve it with XOR calculator, I prefer it
Also, if others fix it for me, then there will be no documentation of this problem.

[fxreen]

Re: Problem with BIOS password for MSI GT73EVR

sharing my bios is not dangerous?
I mean posting the BIOS includes my hardware info or serial number

But I'm not sure,
If I can solve it with XOR calculator, I prefer it
Also, if others fix it for me, then there will be no documentation of this problem.

@adamantinus
Your password uses an unknown hash, it is not possible to compute it with the standard AMI_key = int("0x935b", 16)

[adamantinus]

Re: Problem with BIOS password for MSI GT73EVR

@adamantinus
Your password uses an unknown hash, it is not possible to compute it with the standard AMI_key = int("0x935b", 16)

ok, good,thanks for the reply.

Is there a way to find out?
with brute-force tool or hidden in nvram? for example.

[adamantinus]

Re: Problem with BIOS password for MSI GT73EVR

It's better to upload your backup bios here, and someone will try to decrypt it or remove it for you.

I didn't find any information, you're right.
I am attaching the bios in case someone can help me remove the password or cancel it, i'm sorry for the delay.
it's my first day here

[hardware1]

Re: Problem with BIOS password for MSI GT73EVR

I didn't find any information, you're right.
I am attaching the bios in case someone can help me remove the password or cancel it, i'm sorry for the delay.
it's my first day here

No Problem.
Here's your Unlocked file, try it.

[AAAC]

Re: Problem with BIOS password for MSI GT73EVR

@adamantinus
Your password uses an unknown hash, it is not possible to compute it with the standard AMI_key = int("0x935b", 16)

Maybe it's a SHA-1 hash, 160-bit (20-hex bytes).

[adamantinus]

Re: Problem with BIOS password for MSI GT73EVR

No Problem.
Here's your Unlocked file, try it.

The file worked, thank you very much
so the solution was to write zeros to the hash on both nvrams.
not erase, just fill...
That's why I had a checksum error

now everything is solved!!